Fetch commit of last successful WebKit build (default: GTK-Linux-64-bit-Release-Ubuntu-LTS-Build)

last-successful-build-to-git-commit.sh

#!/usr/bin/env bash

# set -x

# Return commit of last successful WebKit build (default: GTK-Linux-64-bit-Release-Ubuntu-LTS-Build).

# Changes:
#   2022-11-16: Reworked script using changes suggested by asutherland to fetch commit number of last successful build directly from build.webkit.org.

BUILDER_NAME=${1:-GTK-Linux-64-bit-Release-Ubuntu-LTS-Build}
if [[ -z $WEBKIT_CHECKOUT_DIR ]]; then
    WEBKIT_CHECKOUT_DIR=${2:-$(realpath $(dirname "$0"))}
fi

usage() {
    local exit_code="$1"
    local program_name=$(basename "$0")

    echo -e "Usage: $program_name BOT-NAME"
    echo -e "Returns commit of last successful build for BOT-NAME"

    exit $exit_code
}

fatal() {
    echo -n "Fatal: "
    echo $@
    exit 1
}

get_last_successful_build() {
    local builder_name="$1"

    curl "https://build.webkit.org/api/v2/builders/$builder_name/builds?order=-number&limit=1&complete=true&state_string=build%20successful" 2>/dev/null
}

query_build_number() {
    local build_info="$1"

    jq -Mr ".builds[0].number" <<< "$build_info"
}

query_builder_id() {
    local build_info="$1"

    jq -Mr ".builds[0].builderid" <<< "$build_info"
}

get_build_changes() {
    local builder_id="$1" build_number="$2"

    curl "https://build.webkit.org/api/v2/builders/$builder_id/builds/$build_number/changes" 2>/dev/null
}

query_revision() {
    local changes_info="$1"

    jq -Mr ".changes[0].revision" <<< "$changes_info"
}

# Main.

if [[ $# -gt 1 ]]; then
    usage 1
fi

if [[ "$1" == "-h" || "$1" == "--help" ]]; then
    usage 0
fi

build_info=$(get_last_successful_build "$BUILDER_NAME")
if [[ $? -ne 0 ]]; then
    fatal "could not fetch build from $BUILDER_NAME"
fi

build_number=$(query_build_number "$build_info")
builder_id=$(query_builder_id "$build_info")
changes_info=$(get_build_changes "$builder_id" "$build_number")
revision=$(query_revision "$changes_info")

echo "$revision"

Thank you Andrew for looking into this. I'm sorry the script didn't work as expected.

I remember I looked back in the day how to fetch the Git commit directly from the build JSON data, instead of digging into the commit history, but I didn´t find a way to do it. Also querying the JSON document with jq instead of grepping is a much better approach.

I think I'm going to update the script with your changes to avoid confussing anyone looking for how to query data from Bugzilla :D

No worries, iteration is always the name of the game in automation like this! (And it's always so energizing to be able to collaborate with people on things, especially searchfox! :)

👍 to updating the script to avoid confusion.

Updated script with changes.